<!DOCTYPE html>
<html>
<head>
    <title>Vue 3 计数器</title>
    <script src="https://unpkg.com/vue@3/dist/vue.global.js"></script>
</head>
<body>
    <div id="app">
        <p>当前计数：</p>
        <button>增加</button>
        <button>减少</button>
    </div>

    <script>
       
    </script>
</body>
</html>